Temur Charger is a uncommon Creature — Horse card from Khans of Tarkir (KTK), collector number 153. Current market price: $0.23 (foil $0.56), TCGplayer market prices via Scryfall.
Morph—Reveal a green card in your hand. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, target creature gains trample until end of turn.